Dynamo-electric machine



(No Model.)

J. JENKINS.

DYNAMO ELECTRIC MACHINE.

No. 350,000. Patented Sept. 28, 1886.

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UNITED STATES PATENT JABEZ JENKINS, OF PHIL ADELPHIA, PENNSYLVANIA.

DYNAMO-ELECTRIC MACH zFldGfFIGATION forming part of Letters Patent No.350,000, dated iiepternber 28, 1886.

Application filed April-5, 1880'.

To all whom it may concern.-

Be it known that I, Jnnnz JnNKiNs, a citizen of the United States,residing at the city and county of Philadelphia, in the State ofPennsylvania, have invented new and useful improvements inDynamo-Electric Machines, of which the following is a specification.

This invention relates to drum-armatures for dynaiiioelectric machines;and my improve ments consist in the construction and system of windingthe coil, as hereinafter fully described and claimed.

In the drawings, Figure 1 represents an end view of the drum-armature;and Fig. 2, a longitudinal section through the same, taken on the line:0 a; of Fig. 1.

A is a revolving shaft upon which the drumarmature is mounted.

B are two circular heads, of hard wood or other suitable material, whichform the ends of the drum and are secured to the said revolving shaft bymeans of the flanges 71.

G are horizontal strips placed around the circumference of the saidheads and secured to them by screws 0. Any even number of strips may beused, as found convenient and accordingto the size of the machine, andthe strips may be connected to the heads by hoops or bands, or in anyother convenient manner. Holes 0 are bored in a line through each of thestrips 0, about an inch apart, though I do not confine myself to thisdistance, and varying in number according to the size of the machine.The outer end of each hole 0 is bored out larger than the inner end, andforms a pocket or recess, c.

D are cores, formed of a number of soft-iron wires, the core beingone-fourth to three-eighths of an inch in diameter, and about two inchesin length, though I do not confine myself to this size. Each corecontains a sufficient num-- ber of wires to fill the hole 0 when placedin it, and the.wires are of sufficient length to pro ject some distancethrough the inside of the strip, where they are fastened or bound byclamps or otherwise, and extend outward through the recess 0 to thesurface of the drum.

E is the insulated copper wire of the coil. This wire is started at theshaft, and is carried outward to one end of a strip. It then is bent andis carried horizontally to the first core.

Serial No. 197,757. (No model.)

The horizontal wire is then wound around the outer end of the said corefor about one-third of its length and back again, forming the spi ral 6,though i do not limit myself to two layers. This spiral fits inao therecess c" in the strip G. The wire is then carried horizonl ally alongthe surface of the strip to the next core, and is wound about it intoanother similar spiral, and so for all the cores. The horizontal partsof the coil-wire upon the surface of the drum are marked 0. 0n reachingthe end of the drum the wire is carried across the end of it, on theoutside of the head, to the strip upon the opposite side, and a secondse ries of spirals, e, and horizontal portions 6, is again formedsimilar to that before described. All the spirals are wound in the samedirection, and the circuit is completed by bringing the end of the wireback to the shaft at the same end of the drum where it started. The endsof the wire E are each connected with a segment of the commutator in theusual manner. In a similar manner each remaining pair of strips in thedrum is provided with a series of radial cores of soft-iron wires havingtheir ends surrounded by spirals which are connected together byhorizontal wires passing round the drum. The drum is made to revolve between the poles of the dynamo in the ordinary manner, and thecommutators, brushes, and other parts differ in no essential particularfrom those commonly used in connection with drum-armatures, Nhen thedrum is rota-ted in the magnetic-field a current of su perior force isgenerated by this arrangement.

I claim- 1. In a drum-armature, the combination of a revolving shaft,circular heads secured upon the said shaft, horizontal strips connectingthe said heads and having a line of holes in them, cores of soft ironpassing through the said holes radially to the shaft, and a circuit-wirewound horizontally about the drum and comprising in its length a seriesof spirals wound around the said cores, substantially as and for thepurpose set forth.

2. In a drum-armature, the combination of a revolving shaft, circularheads secured upon the said shaft, horizontal strips connecting the saidheads and having a line of holes in them, the outer ends of which arecounterbored to form pockets, a series of cores of soft iron passingthrough the said holes radially to the said shaft, a series of spiralsplaced in the said pockets and wound around the said cores, and acircuit-wire wound horizontally about the drum and including the saidspirals in the circuit, substantially as and for the purpose set forth.

3. The series of cores-D, each formed of a bound bundle ofsoft-ironwires,in combination with the longitudinal drum-strips 0, through whichsaid cores extend radially from the outside surface toward the center ofthe drum, and a circuit-wire, E, wound around the outer end of eachcore, beginning at one end of the drum and extending over its oppositeend in continuous succession from end to end on opposite sides of saiddrum and terminating at the starting end thereof, substantially as described, for the purpose specified.

4. In a drunrarmature, the combination of a series of soft-iron cores,each core formed of a bundle of soft-iron wires, with the circuitwire Eforming a coil-binder for each core-bundle, and a means whereby eachcore is secured to the drum in longitudinal lines.

5. In a drum-armature for dynamo-electric machines, the combination of aseries of separate soft-iron cores arranged in longitudinal lines, withthe circuit-wire wound around each core in the same direction from endto end of the drum, crossing the-end of the latter and returning on itsopposite side around a similar series of cores, substantially asdescribed, for the purpose specified.

6. The combination, in a drum-armature for dynamo-electric machines, ofa series of softiron cores, each formed of a bundle of wires boundseparately at their inner ends, with a circuit-wire connecting andbinding the several cores in separate bundles at their outer ends, and asuitable socketed carrier, to which the said series of cores are boundby the circuit-wires, substantially as herein set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JABEZ JENKINS.

Witnesses:

A. G. STOUT,

CHARLES J. MILLER.

